It’s not like there are people checking for immortals, I think it would be flagged by a dmv employee or something when they dont believe a clear 21 year old is actually 150. Let’s assume it’s current day im caught and not bring speculation on what the US is like in the year 2139 is like.
Btw there’s a movie about that: The Age of Adaline.
I can recommend the movie “the man from earth” on the topic. I think he switches identities every 20 years or so…